SnS2 nanosheets anchored on porous carbon fibers for high performance of sodium-ion batteries.

Constructing nanocomposites uniformly anchored on conductive matrix has been regarded as a valid method to improve electrochemical performance. In this work, the SnS 2 /PCF composite was fabricated by a feasible nanocasting strategy, and its microstructure was that the SnS 2 nanosheets anchored on porous carbon fibers, which can effectively solve the problem of the poor conductivity and large volume fluctuation of SnS 2 during charge/discharge process. Thus, when employed as anode of sodium-ion batteries, the SnS 2 /PCF composite delivered a high reversible capacity of 425 mA h g−1 after 140 cycles at 0.2 A g−1 and superior rate performance (360 mA h g−1 at 2 A g−1), suggesting the SnS 2 /PCF is a promising anode material for SIBs. The SnS 2 nanosheets anchored on porous carbon fibers is fabricated by a facile nanocasting strategy (denoted as SnS 2 /PCF). When used as an anode material for SIBs, it delivers a high specific capacity of 425 mA h g−1 after 140 cycles at a current density of 0.2 A g−1 and superior rate performance (360 mA h g−1 at 2.0 A g−1). Unlabelled Image • The SnS 2 /PCF composite was obtained via facile nanocasting strategy. • The SnS 2 nanosheets uniformly anchored on PCF. • The composite shows high reversible capacity of 425 mA h g−1 (0.2 A g−1, 140 cycles). • The composite exhibits high rate capacity of 360 mA h g−1 at 2 A g−1. [ABSTRACT FROM AUTHOR]